Biological data - Integrated acoustic and trawl survey of Pacific hake off the Pacific Coast

Description

Integrated acoustic and trawl surveys are used to assess the distribution, biomass, and biology of Pacific hake along the Pacific coasts of the United States and Canada. Scientists from the Northwest Fisheries Science Center (NWFSC) and Department of Fisheries and Oceans-Canada are responsible for conducting the survey. The survey consists of a series of transects that are oriented generally east-west, and are spaced at a nominal 10-nautical mile interval. Sea depth at the nearshore end of individual transects is typically 50 m; offshore extents are typically at a depth of 1,500 m. Geographical coverage extends from near Morro Bay, CA north to Dixon Entrance. Acoustic data are collected during daylight hours with a Simrad EK60 scientific echo sounder coupled with the ER60 software system. Trawl samples from pelagic and bottom trawls are used to classify the observed backscatter layers to species and size composition and to collect specimens of Pacific hake and other organisms. Analysis of acoustic data involves identification and delineation of backscatter layers that are attributed to Pacific hake. The biomass estimate and length-at-age composition of Pacific hake generated from this survey are used in analysis and management of the stock. This survey is conducted on a biennial basis. There is a firm deadline for producing the biomass estimate in the middle of the December following the survey. Biological data collected from FSCS during catch processing.

Resources

Name Format Description Link
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
0 Operation details from the Integrated acoustic and trawl survey of Pacific hake off the Pacific Coast https://www.webapps.nwfsc.noaa.gov/apex/parrdata/inventory/tables/table/operation_acoustics_fact
23 Operation details from the Integrated acoustic and trawl survey of Pacific hake off the Pacific Coast https://www.nwfsc.noaa.gov/data/api/v1/source/acoustics.operation_acoustics_fact/selection.json
0 Catch data from the Integrated acoustic and trawl survey of Pacific hake off the Pacific Coast https://www.webapps.nwfsc.noaa.gov/apex/parrdata/inventory/tables/table/catch_acoustics_fact
23 Catch data from the Integrated acoustic and trawl survey of Pacific hake off the Pacific Coast https://www.nwfsc.noaa.gov/data/api/v1/source/acoustics.catch_acoustics_fact/selection.json
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/18470
0 Biological data collected from FSCS during catch processing https://www.nwfsc.noaa.gov/data/map
0 Biological data collected from FSCS during catch processing https://www.nwfsc.noaa.gov/data/map
0 NWFSC Dataset Information page. Biological data collected from FSCS during catch processing https://www.webapps.nwfsc.noaa.gov/apex/parrdata/inventory/datasets/dataset/3479
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/nwfsc/dmp/pdf/18470.pdf

Tags

  • acoustics
  • merluccius productus
  • pacific hake
  • echo integration-trawl survey
  • instrument not applicable
  • northwest fisheries science center
  • doc/noaa/nmfs/nwfsc
  • hake
  • national marine fisheries service
  • iats
  • noaa. u.s. department of commerce
  • acoustic survey
  • bottom sampler
  • pacific whiting
  • fram (fishery resource analysis and monitoring) division
  • u.s. and canadian waters off the pacific coast
  • bell m. shimada

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